Anyone have a suggestion for a decent race muffler brand?

muffler? vee done knead noh steen'kin muffler!





straight pipe that shit with a cat on the end, it'll be quiet enough.



Edited 1 time(s). Last edit at 01/11/2011 04:24PM by Jon Burke.

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alkun
Anyone have a suggestion for a decent race muffler brand?

I just go to Goodwill or Starvation army and get a nice cashmere wool one.

These look like they'd do:

For your Volvo?? A Campbell soup can with a few hole punched in it would be appropriate....

Flowmaster lost their patent so any number of companies make a very nice clone of the old 40series for around $30-40. Steel construction and very durable. 2 1/2 piping will flow more thru the muff than your car will produce. 3'' and your motor may actually be sucked thru the exhaust on drop throttle decel....

Stay away from Magnaflow, cheap shiney crap.

If you've got a turbo, skip the muffler.

Cherry Bomb is cheap and durable, and should get you under the limit.

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heymagic
For your Volvo?? A Campbell soup can with a few hole punched in it would be appropriate....

Flowmaster lost their patent so any number of companies make a very nice clone of the old 40series for around $30-40. Steel construction and very durable. 2 1/2 piping will flow more thru the muff than your car will produce. 3'' and your motor may actually be sucked thru the exhaust on drop throttle decel....

Stay away from Magnaflow, cheap shiney crap.

OH! tyhat kind!
OK here;

Even without a turbo running a cat should get you under the limit. At least at NASA events the test is 3,000 rpm steady state. It does not take much throttle to get a motor up to 3k with no load, so the sounds should be low.

Now what you want the car to sound like on a transit is another story. The flowmaster design or glass pack are the way to go

We'll see how my exhaust from Ryan at TRF comes but it should cut down on the noise a lot. I'm doing an under car mounted cat, mid-pipe resonator, and a rear mounted muffler with 2.5" piping. I drove the car to his shop with a ghetto fixed exhaust on the freeway, and it wasn't that quiet. Cruising 60MPH in 5th @ 4500rpm my ears were hurting. Considering that most rally transits will be at 55mph or less I won't get any higher than that, but it was too much to be honest. And I only have a puny 1.6L motor...

Vws are tough on exhaust noise. They are louder and buzzier than many cars. Cam profile?? Old 289 Fords are noiser than old 283 Chevs, 318 Mopar very buzzy also. Make sure you have flanges on the cat and a spare if it is midship.

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BillyElliot
We'll see how my exhaust from Ryan at TRF comes but it should cut down on the noise a lot. I'm doing an under car mounted cat, mid-pipe resonator, and a rear mounted muffler with 2.5" piping. I drove the car to his shop with a ghetto fixed exhaust on the freeway, and it wasn't that quiet. Cruising 60MPH in 5th @ 4500rpm my ears were hurting. Considering that most rally transits will be at 55mph or less I won't get any higher than that, but it was too much to be honest. And I only have a puny 1.6L motor...

Please get Ryan @ TRF to tuck that cat up well, and put some shields around it.

there are 2 things in the world that kill cats.

#1. Heat....this is caused by running a car flat out for long periods of time...cats are designed to run at 20% throttle cruising down the highway. Run flat out they not only don't really work as cats, but they also over heat. The only solution is getting it further from the engine.

#2. Impacts....no matter if it's a metal core cat, or ceramic. The impacts even to the exterior surface will break apart the insides.

IMHO, there is ONLY one place for a cat in a rally car, and that is 3" from the exhaust tip at the back bumper.

I actually just finished a 2.5" system on a '98 civic with a JDM B18 in it. The system was a JDM brand header (greddy or something), with a glasspack resonator in the mid-pipe (basically in OEM position), and a Metal core cat at the rear bumper. The car is not terribly loud, he actually drove it to work a couple times already, and drives it to rally-x events.

I can tell you that on this civic, at the end of a good trackday run, look inside the tail pipe and the cat core is glowing RED!

Also...if you are using a ceramic cored cat, you will not get any more than 3-4 events out of it, so be prepared to change. Doesn't matter where the cat is (under car or in the bumper), or if the car is N/A or turboed.

If you use a Metal core cat, the cat will last longer than your car, assuming that you put it in the rear bumper.

Ha! good stuff. At North Nevada Rally there were some long straight highway transits, and the 70mph nevada speed limit, the volvo has the 4 speed and the low rear end, pipe with one little glass pack and a resonator, it was screaming and not even breaking the limit! I like the sound, but its hard to hear the codriver. It'll also be nice to have the T5 with the 0.65 "transit" 5th.

From a different point of view: noise is becoming more of an issue at many events. Make your car quiet. It will help the events and it will cut down on fatigue in the car. I like the old Flow Masters.

---

Robert.

"You are way too normal to be on Rally Anarchy." Eddie Fiorelli.

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Rallymech
From a different point of view: noise is becoming more of an issue at many events. Make your car quiet. It will help the events and it will cut down on fatigue in the car. I like the old Flow Masters.

HeY!! Fuckin stop it! STOP!
Making sense about noise, whassamatta wit you?

Every deserves the rights to know the joy, the symphony in their ears of permanent tinnitus like I have....

I have flowmaster on my street car, and nought but a snail and cat on the rallycar and neither's too loud. Didn't Grassroots Motorsports just do a muffler comparo, and found that the Burns Stainless made the most power with the least noise? I'd take a looksee at one of those for a NA car.

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alkun
It'll also be nice to have the T5 with the 0.65 "transit" 5th.

Just make sure you have a high enough final drive to make it useable. 5th gear is useless in my car until I'm over 85. Below that I end up having to downshift on any kind of an uphill slope to hold 75ish. Of course, this is all estimating as I've never had a working speedo...